Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2021TRANSIT-350 HD BASE, VAN CARGO EXTENDED, 3.5L ENG VIN 8, AWDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 8 (STARTING SYSTEM - 3.5L ECOBOOST (235KW/320PS))DIAGNOSIS AND TESTINGSTARTING SYSTEMSYMPTOM CHART(S)SYMPTOM CHART: STARTING SYSTEM
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWD
Symptom Chart: Starting System
2021 Ford Transit-350 HD Base, Van Cargo Extended, 3.5L Eng VIN 8, AWDSECTION Symptom Chart: Starting System
WARNING: This page is about a different variant/trim than selected.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. REFER to: Diagnostic Methods .
Symptom Chart
| Condition | Possible Sources | Actions |
|---|---|---|
| The engine does not crank | Refer to the Pinpoint Test | GO to Pinpoint Test A |
| The engine cranks slowly | Refer to the Pinpoint Test | CARRY OUT the starter system component test. Refer to Starter Motor - Positive Circuit Test . |
| The engine cranks but will not start | Ignition fault | Refer to Engine Controls - Symptom Charts (Except Diesel & Hybrid) . |
| Unusual starter noise | Refer to the Pinpoint Test | GO to Pinpoint Test B |
| The starter spins but the engine does not crank | Starter motor | INSPECT the starter motor mounting and engagement. REPAIR as necessary. |
| Damaged flexplate | INSPECT the flexplate for damaged, missing or worn teeth. REPAIR as necessary. | |
| The starter does not disengage from the flexplate | Starter relay Wiring, terminals or connectors |
REMOVE the starter relay. If the engine stops cranking, INSTALL a new relay. If the engine continues to crank, REPAIR circuit CDC26 (GY/OG) for a short to voltage. |
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.